Damn dude... I would have thought a small strip of 16 gauge would have been the preferred method to address that wide of a gap. I know it works, and being talented/disciplined (is key as you demonstrated/described) - but that seems like a lot of time and material wasted.
I've only ever bridged tacks that wide on exhaust. But, I am a ham-fisted ape.
Understanding that this is a rare instance, and it may never come up again, you may want to look into a TIG as resources allow. The precision afforded will compliment your skills remarkably.